apache / apache/datafusion-ballista
Implement hash partitioned aggregation in Ballista
- Dominant language
- Rust
- Stars
- 2.1k
- Forks
- 320
- Avg merge
- 1d 22h
- Merged PRs (30d)
- 66
Description
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.**
PR https://github.com/apache/arrow-datafusion/pull/320 implemented hash partitioned aggregation in DataFusion. We should implement the same optimization in Ballista.
**Describe the solution you'd like**
DataFusion and Ballista should have consistent query plans.
**Describe alternatives you've considered**
None
**Additional context**
None
Contributor guide
Research direction
Start by reading DataFusion PR 320 to understand the existing hash-partitioned aggregation optimization, then inspect Ballista's corresponding query-planning implementation. The work is complete when Ballista and DataFusion produce consistent query plans for hash-partitioned aggregation.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- data-engineering, distributed-systems
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100